Fig. 10

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Variation with temperature of the broadening rate (w/nHe) of the D2 (solid line) and D1 (dashed line) resonance lines of Na perturbed by He collisions using the potentials of Dell’Angelo et al. (2012, red curves), Pascale (1983, blue curves), van der Waals potentials (black dotted). The rates are in units of 10−20 cm−1/cm−3.
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